High temperature vacuum bags, like freezing vacuum bags, are also typical polyolefin polymers. There are many similarities between the two vacuum bags, such as non-toxic, odorless, tasteless, reliable hygienic performance; acid, alkali, salt and a variety of chemical substances, stable performance; balanced physical and mechanical properties; excellent moisture and moisture resistance, a certain degree of oxygen and oil resistance; excellent formability and good thermal sealing. Like high temperature vacuum bags, high temperature vacuum bags have the advantages of large production, wide source and low price.
The main differences between high temperature vacuum bag and freezing vacuum bag are as follows:
(1) The heat resistance of high temperature vacuum bags is much better than that of freezing vacuum bags, which can withstand the high temperature of more than 120 C. The food packaged in high temperature vacuum bags can even withstand the requirements of high temperature cooking above 140 C.
(2) The transparency and strength of high temperature vacuum bag are also better than that of freezing vacuum bag. Although the oil resistance of high temperature vacuum bag is not ideal, it is better than freezing vacuum bag.
(3) Compared with frozen vacuum bags, the main disadvantage of high temperature vacuum bags is poor cold resistance. Homopolymer of high temperature vacuum bags may show obvious brittleness at 0 C.
In conclusion, the difference between high temperature vacuum bag and frozen vacuum bag is still very big. It depends on the packaging requirements of the product to determine what kind of vacuum bag is suitable. It is either the most expensive or the best. It is only good to see what is suitable.
